Baffle for steam drums



Aug. 30, 1932. H. J. KERR BAFFLE FOR STEAM DRUMS Filed Nov. 27, 1928 6 Sheets-Sheet l INVENTOR wffiz/m/ IM- ATTORNEY Aug. 30, 1932. H. J. KERR BAFFLE FOR STEAM DRUMS Filed Nov. 27, 1928 6 Sheets-Sheet 2 Aug. 30, 193 2.

H. J. KERR BAFFLE FOR STEAM DRUMS Filed Nov. 27, 1928 e Sheets-Shet 5 ATTORNEYS Aug. 30, 1932. H, J KERR 1,875,015

BAFFLE FOR STEAM DRUMS Filed Nov. 27, 1928 6 Sheets-Sheet 4 Q ATTORNEYS Aug. 30, 1932. H. J. KERR 1,875,015

BAFFLE FOR STEAM DRUMS Filed Nov. 27, 1928 6 SheetsSheet 5 ATTORN EY Aug. 30, 1932. H. J. KERR BAFFLE FOR STEAM DRUMS Filed Nov. 27, 1928 6 Sheets-Sheet 6 ATTOR N EKS Patented Aug. 30, 1932 UNITED STATES PATENT 1 OFFICE HOWARD J. KERR, OF-WESTFIELD, NEW JERSEY, ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY BAIFLE FOR STEAM DRUMS Application filed November 27, 1928. Serial No. 322,119.

This invention relates to a bafiie for the steam and water drum of a boiler to separate the mixture of steam and water from each other and permit dry steam to be withdrawn from the drum. The invention will be un derstood from the description in connection with the-accompanying drawings in which Fig. 1 is a section along the line 11 of Fi 2; Fig. 2 is a longitudinal section throug 10, a steam and water drum partly broken away, taken along the line 22 of Fig. 1; Fig. 3 is a section along the line 33 of ig. 4; Fig. 4 is a longitudinal section through a modification taken along the line 44 of Fig. 3; Figs. 5, 6 and 7 are side, end and plan views, respectively, of one of the details taken along corresponding lines of the several figures; Figs. 8, 9 and 10 are corresponding views of a modification of one of the details taken 29 along similar lines; Fig. 11 is a section along the line 1111 of Fig. 12; Fig. 12 is a longitudinal section through another modification taken along the line 12-12 of Fig. 11; Fig. 13 is a section along the line 13-13 of Fig. 14; Fig. 14 is a longitudinal section through amodification taken along the line 1414 of Fig. 13; Fig. 15 is a section taken along the line 1515 of Fig. 16; Fig. 16 is a longitudinal section through another modification taken along the line 1616 of Fig. 15 Fig. 17 is a side View showing one of the details, and Fig. 18 is a section along the line 1818 of Fig. 17. v

In the drawings reference .character 1 indicates a steam and water drum that is sup ported by straps 2 passing around the drums near the ends thereof. A feed water pipe 3 leads into the drum and is supported inside of the drum by means of straps 4 from the cross supports 5.

Rows of circulating tubes 6 enter. the side.

of the drum and a mixture of steam and water enters the drum through these tubes. A row of curved outlet tubes 7 for steam leads from the upper portion of the drum 1 to a header or separator 8 from which a steam pipe 9 leads to the steam main. A valved drain pipe 10 is provided at the lower side of the separator 8. Connections llfor safety valves are also provided along the upper side of the drum 1.

A shutter type of baflle is located inside of the steam and water drum near the ends of the circulating tubes 6. This baflie comprises a plurality of parallel inclined plates 12 that are spaced apart and supported in position in any convenient manner. The uppermost one of the plates 12 has its upper edge contacting with the inside wall of the drum. A vertically disposed baffle plate 13 is located nearer the middle of the drum than the plates 12. The plate 13 issupported by means of supports 14, and its upper edge terminates short of the drum wall so as to leave a space between the upper edge of the 1 plate 13 and the inside .of the drum. The lower edge of the plate 13 extends below the normal water level in the drum 1. End closure plates 15 close the spaces between the ends of the baflle 13 and the drum on the same side of the baflle 13 as the tubes 6. The end plates 15 at each end of the drum baflle close the spaces between the circulating tube side of the drum shell and vertical drum bafiie and extend below the lowest water level. The water seals this space at the bottom against the short circuiting of steam. The plates 15 may be made in sections to enable them to be inserte through manholes, and the sections can be assembled after having been inserted.

A. row of boxes 16, spaced slightly apart, is located between the end plates 15 near the upper edge of the battle 13 with the upper edge of the baffle 13 preferably extending slightly above the lower edges of the boxes 16. The boxes 16 (Figs. 5, 6 and 7) may each have a narrow vertical front wall 17 with diverging side walls 18 extending from the front wall and a topor cover 19. The top or cover 19 and the upper edges of the side walls 18 are curved to fit the inside wall of the drum 1 as the boxes are installed with short spaces between them at the upper portion of the drum. Each box may be provided with a hole 20 in the top thereof through which holes the'outlet steam pipes 7 extend and are expanded.

Instead of providing the boxes 16 with tops or covers 19, the tops may be omitted and the upper edges of the side walls 18 may by the same reference characters with primes.

, In this modification the front wall 17" extends farther downwardly, and the top 19 extends farther around, the lower edges of the ends of the side walls 18 being extended correspondingly as shown at 22 and 23. The steam and water in the mixture of steam and water entering the drum 1 through the tubes 6 are partially separated from each other by means of the shutter baffle or plates 12, the steam rising and passing over the upper edge of the bafile 13 between the boxes 16, thus separating steam and water. The practically dry steam then passes under the lower edges of the side walls 18 Qf the boxes 16, and then passes through the tubes 7 to the header 8, and thence through the pipe 9 to the steam main.

In the modification shown in Figs. 3 and 4, the boxes 16 are shown as being longer than the boxes 16 in Figs. 1 and 2, being similar to the boxes shown in Figs. 8, 9 and 10. Also, in this modificatio-n water wall tubes 6' of the boiler furnace are shown entering the drum 1 above the tubes 6. A baflie 12' is located in the drum 1 in front of the ends of the tubes 6.

In the modification shown in Figs. 11 and 12, rows of water wall tubes-6 are also shown as entering the steam and water drum 1 above the tubes 6. In this modification a plurality of strengthening ribs 13 for the bafile 13 are illustrated. An inclined plate 25 is located near the top of the drum withits upper edge contacting with the wall of the drum along a line above the baffle 13, and with its lower edge curved so as to extend substantially vertical. The baffle plate 25 may be supported by means of supports 27 and its lower edge may rest upon cross supports or angle irons 28. A bafile 29 with its upper edge contacting with the wall of the drum may be located in front of the tubes 6'.

In the modification shown in Figs. 13 and 14, the shutter baffles 12 are arranged some: what differently from those shown in the other-views)! the plates thereof being fewer 1n number and wider than those shown in the other views, and located somewhat higher. A sloping bafile plate 30 extends from the drum wall on one side of the center line and its lower edge terminates short of the drum wall onthe other side of the center line. A second baflie 31 is located parallel to the baflle plate 30 with its upper edge terminating short of the drum wall and its lower edge connected to a vertical baflie 32 that extends below the normal water level in the drum. Supports 30 are provided for the baflles 30 and 31. End plates 33 are provided extending across the drum at the ends of the baflles 30 and 31. In this modification a balile 29 is also shown in front of the tubes 6.

In the modification shown in'Figs. 15 and 16 the steam tubes 7' are shown as being much longer than those in the other Views and curved around so as to enter the drum 8 on the other side from the drum 1. In this modification the plate 30' is similar to the plate 30 in Figs. 13 and 14 and the baffle plates 31' and 32' are somewhat similar to.

the baffle plates 31 and 32 in Figs. 13 and 14, but are located on the opposite side of the center line of the drum. By curving the tubes 7 so as to enter the drum 8 on the other side from the drilm 1, and so that the convex side of the pipe forms the lower portion thereof where it enters the drum, any water that is unseparated from the steam as it leaves the steam and water drum is further separated by the centrifugal action of the water and steam in passing through the curved pipe, the water entering the drum at the lower side of the pipe.

The shutter bafiles described in the different illustrationsmay be used not only in connection with the other baffles with which they have been illustrated and described, but the plate bafiles illustrated in the various modifications may be interchanged in certain instances. Tubes 35 have been shown in some of the modifications at the lower side of the drum 1. These tubes are nipples that connect to downtake headers and it is to be understood that such nipples may be used in any of the modifications.

I claim:

1. In a steam and water drum, a steam and water separator comprising a series of boxes open at the bottom and a baflie plate at one end of said boxes, the upper edge of said plate being spaced from the drum but extending above the lower edges of said boxes, and the lower edge thereof extending below the normal water level therein, steam outlet pipes connected to the respective boxes, and circulators opening into the drum on the side of said plate away from the boxes.

2. In a steam and water drum, a steam and water separator comprising a series of boxes open at and diverging towards the bottom, a baffie plate at one end of said boxesand extending above the lower edges thereof, transverse plates at the ends of the said baflle plate, steam outlet pipes connected to the respective boxes, and circulators opening into i the drum on the side of the said baflie plate away from the boxes.

3. In a steam and water drum, a steam and water separator comprising a series of boxes water separator comprising a series of boxes emma open at and diverging towards the bottom, a bafie plate at one end of said boxes, and extending above the lower ed es thereof, shutter bafllesbetween said ba e plate and the side wall of said drum, steam outlet pipes connectedto he respective boxes and circula- V tors openings into the drumon the side of the said baflle plate away from the boxes.

4. In a steam and water drum, a steam and at least open at one side and a bafile plate at another side of said boxes, one edge of said plate being spaced from said drum but extending at least to the lower open side of said boxes and the lower edge thereof extending below the normal water level in the drum,

steam outlet pipes connected to the respective boxes, and steam and water entrances into said drum opposlte said baflle plate.

' HOWARD J. KERR. 

